Table 1. Clinical characteristics of participants according to fertility status (n=827).
| Variable | Idiopathic MFI | Unexplained MFI | Fertile | p-valuea | |
|---|---|---|---|---|---|
| No. of individuals (%) | 570 (68.9) | 154 (18.6) | 103 (12.5) | ||
| Age (y) | 0.3 | ||||
| Median (IQR) | 37 (34–41) | 36 (33–41) | 37 (33–40) | ||
| Range | 21–54 | 25–54 | 25–48 | ||
| BMI (kg/m2) | 0.6 | ||||
| Median (IQR) | 24.7 (23.1–26.3) | 24.5 (23.1–26.2) | 24.5 (23.1–27.9) | ||
| Range | 18.5–30.0 | 17.8–29.9 | 18.7–28.8 | ||
| CCI (score) | 0.6 | ||||
| Median (IQR) | 0.0 (0–0) | 0.0 (0–0) | 0.0 (0–0) | ||
| Mean±SD | 0.10±0.1 | 0.10±0.2 | 0.06±0.1 | ||
| Range | 0–7 | 0–4 | 0–2 | ||
| Mean testes volume (Prader’s estimation) | <0.001 | ||||
| Median (IQR) | 20 (15–23) | 20 (15–25)b | 23 (20–25)b,c | ||
| Range | 7–25 | 8–25 | 10–25 | ||
| Mean testes volume <15 mL, n (%) | 135 (23.6) | 21 (13.6) | 5 (4.9) | <0.001 | |
| Waist circumference (cm) | 0.7 | ||||
| Median (IQR) | 92 (86–97) | 91 (85–97) | 89 (81–95) | ||
| Range | 54–119 | 75–114 | 75–120 | ||
| Length of infertility (mo) | 0.6 | ||||
| Median (IQR) | 18 (12–32) | 24 (12–26) | |||
| Range | 12–192 | 12–135 | |||
| Partner’s age (y) | 0.1 | ||||
| Median (IQR) | 35 (32–38) | 34 (31–37) | 35 (31–37) | ||
| Range | 19–47 | 23–45 | 20–44 | ||
MFI: male factor infertility, IQR: interquartile range, BMI: body mass index, CCI: Charlson Comorbidity Index, SD: standard deviation.
ap-value according to the Kruskal–Wallis test and Fisher exact test, as indicated. bp<0.01 vs. idiopathic group. cp<0.01 vs. unexplained group.